Insulator



C. H. THOMAS.

INSULATOR.

APPLICATION FILED MAY 9, 1919. 1,388,21 '7, Patented Aug. 23,1921.

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CYRIL E. THOMAS, OF CHICAGO, ILLINOIS.

INSULATon.

Application led May 9,

State of Illinois, have invented certain new\ and useful Improvements `in Insulators, of which the following is a specification.

The invention relates to improvements in insulators.

One of the objects of the invention is to provide an improved form of insulator and support or hanger therefor, whereby to produce a stable and stanch union between the insulator and its support.

Another object of the invention is to provide a support for an insulator in which the clamp exerts a compressing' strain on the insulating body, which is distributed over a relatively large surface of the more or less refractory material, of which the insulator is usually composed.

And still another object of the invention is to provide an insulator hanger serving as a housing to retain the contacting portions of the insulator relatively dry, when subjected to the effects of the weather.

While my improved insulator and hanger are not designed exclusively for out of door use, as they can conveniently and advantageously be employed for the same purpose indoors, and while it is not confined to any particular form of insulator except the portion thereof adapted for the purpose, it will therefore be understood that the invention is not limited to the specific showing depicted in the drawing, but is of a scope commensurate with and limited only by the definition of the claim.

In the drawings Figure 1 shows a central section of a fragment of an insulator with a hanger attachedy thereto, the section being taken on line 1-1 of Fig. 2.

Fig. 2 is a plan view of the hanger.

Fig. 3 is a detail of part of the angular clamping ring by which the hanger is secured to the insulating body.

In all the views the same reference characters are employed to indicate similar Specification of Letters Patent.

Patented Ang. 223, 1921.

1919. serial No. 295,@49.

the hanger7 is cup shaped, having a skirt 8 depending from a flat base having a central perforatedV aperture 9. The aperture affords means for the introduction of a threaded support, of any desired formation, for the purpose of supporting the insulator and hanger. The hanger is perforated at intervals, as at 10, for screws 11. A clamping ring 12 is divided into a plurality of sections, in the drawings there are shown to be two parts, 13 and 14. Themembers 13 and 14 are preferably of metal and contain threaded perforations `16 to receive the threaded Shanks of the screws 11. The members 13 and 14 are angularly shaped in cross section, as clearly shown in Fig. 1, the inner surface corresponding in its angular relation with the outer surface of the cone portion 6 of the insulator, and the outer surface of the clamping member being substantially vertical to correspond with the inner surface of the skirt 8 of the hanger 7.

To apply the hanger to the insulator, it is necessary first tc put the clamping members 13 and 14 in the positions that they occupy when the hanger is permanently located, then place the cup shaped member 7 on 'the outside of the clamping members and insert the screws. It is obvious, now, that when the screws are tightened the ring members 13 and 14C are drawn farther into the skirtl of the hanger and thereby they will firmly hold the hanger in Contact with the insulator. It will be observed that the clamping members 13 and 14, engage relatively large surfaces of the projection 6. The clamping members being divided into a plurality of sectors or parts, adapt themselves to the contour of the insulator and, on account of the wedging action effected by the tightening of the screws there is no breaking strain imparted to the more refractory insulating material. There is no projecting attaching means, such as screws, bolts or the like, and the outside contour of the hanger is round and smooth, the best shape or form to pres vent brush discharge and other leakages.

The insulator may be employed for various purposes; for supporting high tension con ductors, bus bars, switches, transformers, and the like, and there may be a plurality of hangers connected to or associated with a single insulator, should occasion require.

Having described my invention, what I claim is n f An insulator, and hanger therefor, said sov insulator having.,r an integral annular oonoidal projection similar in shape to a truncated cone With its base extending from the body and its apex merging in the body there of, in combination with a Cup-shape hanger having` a flat base part overlying the cone base and a skirt extending over the circumferental part of the cone; a split ring, an

gular in cross-section, for insertion between said skirt and Cone7 and screws passing 10 through said base into said split ring to Wedge the latter between said skirt and cone and to clamp the hanger to the insulator.

In testimony whereof I have hereunto subscribed my naine.

CYRIL H. THOMAS. 

